EP2174765A2 - Procédé de décoration dans le moule - Google Patents

Procédé de décoration dans le moule Download PDF

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Publication number
EP2174765A2
EP2174765A2 EP08173015A EP08173015A EP2174765A2 EP 2174765 A2 EP2174765 A2 EP 2174765A2 EP 08173015 A EP08173015 A EP 08173015A EP 08173015 A EP08173015 A EP 08173015A EP 2174765 A2 EP2174765 A2 EP 2174765A2
Authority
EP
European Patent Office
Prior art keywords
thin
film substrate
hard
coating layer
pattern
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP08173015A
Other languages
German (de)
English (en)
Other versions
EP2174765A3 (fr
EP2174765B1 (fr
Inventor
Pao-Chuan Huang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Taiyi Precision Tech Corp
Original Assignee
Taiyi Precision Tech Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Taiyi Precision Tech Corp filed Critical Taiyi Precision Tech Corp
Publication of EP2174765A2 publication Critical patent/EP2174765A2/fr
Publication of EP2174765A3 publication Critical patent/EP2174765A3/fr
Application granted granted Critical
Publication of EP2174765B1 publication Critical patent/EP2174765B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14778—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the article consisting of a material with particular properties, e.g. porous, brittle
    • B29C45/14811—Multilayered articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/1418—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure
    • B29C2045/14237—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure the inserts being deformed or preformed outside the mould or mould cavity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/1418—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2715/00—Condition, form or state of preformed parts, e.g. inserts
    • B29K2715/006—Glues or adhesives, e.g. hot melts or thermofusible adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
    • B29K2995/002—Coloured
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0087—Wear resistance

Definitions

  • the present invention relates to a method of in-mold decoration, and more particularly to a method of forming an injection-molded plastic layer and a printed pattern on both sides of the thin-film substrate respectively.
  • the in-mold decoration has been become a popularly employed technology in the field of surface decoration.
  • a shapeable film is employed to replace the conventional manufacture processes including painting, printing, heat pressing, and chromium plating steps which are performed after the components are shaped. Therefore, the surface effects and patterns of the products can be increased and the required steps for manufacturing the products can be also decreased. Accordingly, the taken manufacture time and the production cost can be significantly reduced. Therefore, the method of in-mold decoration is widely applied to the mobile phones, the laptop computers, the home appliances such as washing machines, and even the dashboard and case decoration of cars.
  • FIG. 1 this figure shows a process for manufacturing a product in accordance with the conventional method of in-mold decoration.
  • the ink is printed on the surface of the thin-film substrate 10 so as to form the required pattern 14.
  • an anti-ink spreading layer 16 and an adhesive layer 17 are printed on the surface of the pattern 14.
  • an injection molding treatment is performed on the surface of the adhesive layer 17 so as to form a plastic layer 18 on the surface of the adhesive layer 17.
  • a heat-pressing procedure must be utilized to shape the thin-film substrate via the heat-pressing mold before the performing of the injection molding procedure.
  • the crack phenomenon will occurs easily on the surface of the thin-film substrate during the heat-pressing procedure, resulting in that the height and the R angle of the 3D-shaped products are confined so it is unable to fulfill the requirements of industrial designers.
  • the present invention provides a method of in-mold decoration, which comprises the following steps of providing a thin-film substrate having a first surface and a second surface opposed to the first surface, printing a pattern on the first surface of the thin-film substrate, coating a hard-coating layer on the pattern, applying a UV light to harden the hard-coating layer, cutting the thin-film substrate, and performing an injection molding procedure to form a plastic layer on the second surface of the thin-film substrate.
  • a heat-pressing procedure is further performed between the step of coating the hard-coating layer and the step of hardening the hard-coating layer so as to provide the thin-film substrate with a 3D shape.
  • a hot-air drying treatment is further performed on the hard-coating layer coated on the first surface before the performing of the heat-pressing procedure so as to initially dry the hard-coating layer.
  • FIG. 1 shows a process for manufacturing a product in accordance with the conventional method of in-mold decoration
  • FIGS. 2a-2d show a process of manufacturing a planar product in accordance with the method of in-mold decoration of the present invention
  • FIGS. 3a-3d show a process of manufacturing a 3D-shaped product in accordance with the method of in-mold decoration of the present invention
  • FIG. 4 shows a detailed process of the method of in-mold decoration of the present invention.
  • FIGS. 2a-2d show a process of the method of in-mold decoration of the present invention.
  • a thin-film substrate 20 is provided.
  • This thin-film substrate 20 has a first surface 20a and a second surface 20b opposed to the first surface 20a.
  • this thin-film substrate 20 is a transparent thin film and is stored by a roll-to-roll method.
  • a roll-type printing machine is utilized to form a pattern 22 on the first surface 20a of the thin-film substrate 20 by printing ink thereon.
  • the pattern 22 is printed on the first surface 20a of the thin-film substrate 20 by the roll-to-roll method.
  • the thin-film substrate 20 is stored still by the roll-to-roll method.
  • an anti-ink spreading layer 21 is optionally printed on the first surface 20a of the thin-film substrate 20 before performing the step of forming the pattern 22 on the first surface 20a of the thin-film substrate 20. And, after the anti-ink spreading layer 21 is formed, the pattern 22 is then printed on the upper surface of the anti-ink spreading layer 21.
  • the above-described anti-ink spreading layer 21 is also formed by the roll-to-roll method.
  • a protection film is optionally adhered to the first surface 20a of the thin-film substrate 20 for covering the pattern 22 so as to protect the pattern 22 printed on the thin-film substrate 20 against scratch or pollution since the thin-film substrate 20 that has the pattern 22 printed thereon is stored by the roll-to-roll method.
  • the thin-film substrate 20 is then stored by the roll-to-roll method, wherein the protection film is adhered thereto by using a back-gluing machine.
  • a hard-coating layer 24 is coated on the surface of the pattern 22 and then the UV light is utilized to irradiate and harden the hard-coating layer 24, wherein the procedure of coating the hard-coating layer 24 on the pattern 22 is performed by using an auto coating machine, and then a hot-air drying treatment is performed so as to initially dry the hard-coating layer 24. Thereafter, the UV light is utilized to harden the hard-coating layer 24.
  • the protection film must be stripped off first before the step of coating the hard-coating layer 24 on the pattern 22.
  • another protection film can be further optionally adhered to the first surface 20a of the thin-film substrate 20.
  • a cutting procedure is performed on the thin-film substrate 20, wherein a steel cutting machine is utilized for cutting along the outline of the thin-film substrate 20 so as to obtain the required portion of the thin-film substrate 20.
  • an injection molding procedure is performed on the thin-film substrate 20 by using an injection molding machine for forming a plastic layer 26 on the second surface 20b of the thin-film substrate 20. Because the injection-molded plastic layer 26 is formed on the second surface 20b of the thin-film surface 20, the pattern 22 printed on the first surface 20a is thus prevented from the occurrence of ink spreading phenomenon.
  • a heat-pressing procedure is additionally performed between the step of coating the hard-coating layer 24 and the step of irradiating the hard-coating layer 24 with the UV light so as to provide the thin-film substrate 20 with a 3D shape.
  • FIGS. 3a-3d show a process of manufacturing a 3D-shaped product in accordance with the method of in-mold decoration of the present invention.
  • a hot-air drying treatment can be performed before the heat-pressing procedure so as to initially dry the hard-coating layer 24.
  • the initially dried hard-coating layer 24 helps the sequent shaping of the thin-film substrate 20.
  • a heat-pressing machine and a heat-pressing mold are utilized so as to heat press the first surface 20a of the thin-film substrate 20 for thereby providing the thin-film substrate 20 with the required 3D shape.
  • an irradiating procedure is performed on the hard-coating layer 24 so as to completely harden the hard-coating layer with the UV light.
  • the UV light with an energy range from 500 to 800 joules is utilized for irradiating the hard-coating layer 24.
  • the hardness of the hard-coating layer 24 can achieve a value range from 500 to 765 g/H.
  • a cutting procedure is performed on the thin-film substrate 20 so as to obtain the required shape, and then an injection molding procedure is performed on the thin-film substrate 20 for forming a plastic layer 26 on the second surface 20b of the thin-film substrate 20.
  • a step S1 is performed for printing an anti-ink spreading layer 21 on a first surface 20a of the thin-film substrate 20 by a roll-to-roll method.
  • a baking step S20 can be performed on the thin-film substrate 20 with a temperature range between 65 and 90 degrees centigrade for about 5 to 15 minutes so as to dry the anti-ink spreading layer 21.
  • the step S1 is omittable if the following injection molding procedure does not bring about the occurrence of ink spreading phenomenon.
  • a step S2 is performed for printing ink on the thin-film substrate 20 so as to form a pattern 22 on the surface of the anti-ink spreading layer 21 by the roll-to-roll method.
  • the step S20 can be performed on the thin-film substrate 20 with a temperature range between 65 and 90 degrees centigrade for about 5 to 15 minutes so as to dry the ink of the pattern 22.
  • a step S3 is performed for forming a protection film on the surface of the pattern 22.
  • this step S3 is optionally omittable.
  • a step S4 is performed for coating a hard-coating layer 24 on the surface of the pattern 22.
  • a step S40 is performed for performing a hot-air drying treatment so as to initially dry the hard-coating layer 24.
  • a step S5 is optionally performed for forming a protection film on the surface of the hard-coating layer 24 on demand.
  • a step S6 is additionally performed for shaping the thin-film substrate 20 by a heat-pressing procedure. Thereafter, a step S7 is performed for completely hardening the hard-coating layer 24 by irradiating the hard-coating layer 24 with the UV light.
  • a step S8 is performed for cutting the thin-film substrate 20 by a cutting procedure.
  • a step S9 is performed for forming a plastic layer 26 on a second surface 20b of the thin-film substrate 20 by using an injection molding procedure, and thereby obtaining the final product.
  • the method of in-mold decoration of the present invention has considerable advantages.
  • the injection-molded plastic layer and the printed pattern are located on both sides of the thin-film substrate respectively so the injection-molded plastic layer does not touch the ink directly and thus the occurrence of ink spreading phenomenon can be reduced effectively.
  • the required number of times for printing the anti-ink spreading layer can be significantly reduced, thereby decreasing the cost effectively and increasing the competitiveness of the injection molded products.
  • the hard-coating layer can be initially dried by the hot-air drying procedure before the step of shaping of the thin-film substrate by the heat-pressing procedure. Then, the UV light is utilized for completely hardening the hard-coating layer so as to meet the physical property requirement for surface. In this way, the shaped thin-film substrate can maintain its 3D shape and thereby avoid the occurrence of deformation caused by insufficient surface hardness. Moreover, in the heat-pressing procedure, the thin-film substrate has comparatively less ability to adhere to the heat-pressing mold so the production performance of the heat-pressing procedure can be thus increased.
  • the thin-film substrate still has considerable expansibility after the initial drying of the hard-coating layer so the thin-film substrate can be shaped into the required 3D shape via the heat-pressing mold and then hardened by the UV light irradiation.
  • the surface of the thin-film substrate is prevented from the occurrence of cracks caused by excessive surface hardness during the heat-pressing procedure.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)
EP20080173015 2008-10-07 2008-12-29 Procédé de décoration dans le moule Expired - Fee Related EP2174765B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW097138531A TWI348400B (en) 2008-10-07 2008-10-07 Method of in-mold decoration

Publications (3)

Publication Number Publication Date
EP2174765A2 true EP2174765A2 (fr) 2010-04-14
EP2174765A3 EP2174765A3 (fr) 2010-06-09
EP2174765B1 EP2174765B1 (fr) 2014-12-10

Family

ID=41625171

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20080173015 Expired - Fee Related EP2174765B1 (fr) 2008-10-07 2008-12-29 Procédé de décoration dans le moule

Country Status (4)

Country Link
EP (1) EP2174765B1 (fr)
JP (2) JP2010089480A (fr)
KR (1) KR101103812B1 (fr)
TW (1) TWI348400B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2281674A1 (fr) * 2009-07-31 2011-02-09 Hon Hai Precision Industry Co., Ltd. Article de matériau composé et son procédé de fabrication
WO2014044694A1 (fr) * 2012-09-19 2014-03-27 Bayer Materialscience Ag Procédé de fabrication d'une pièce moulée en plastique pourvue d'une peinture durcie par uv ainsi que pièce moulée
CN110435178A (zh) * 2019-09-05 2019-11-12 东莞广华汽车饰件科技有限公司 一种透光胶膜生产工艺

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101793229B1 (ko) 2011-01-18 2017-11-03 삼성디스플레이 주식회사 수납 모듈과 이의 제조 방법 및 이를 포함하는 액정 표시 장치
CN106299193B (zh) * 2016-11-03 2019-02-26 广东阿特斯科技有限公司 一种3d手机电池盖加工方法
CN113102945A (zh) * 2021-03-29 2021-07-13 深圳市锦瑞新材料股份有限公司 一种手机壳复合板材大弧高成型加工工艺

Citations (2)

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Publication number Priority date Publication date Assignee Title
JPS62263013A (ja) 1986-05-09 1987-11-16 Dainippon Printing Co Ltd 絵柄付き射出成形体の製造方法
US20040229042A1 (en) 2001-04-06 2004-11-18 Hooker Michael A. Non-uniform, protective coating on a flexible substrate

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JPS5539338A (en) * 1978-09-12 1980-03-19 Matsushita Electric Ind Co Ltd Preparation for injection-molding
MY121667A (en) * 1996-04-26 2006-02-28 Nissha Printing Thermo and active energy ray curable resin composition used for protecting layer of transfer material transfer material surface protecting material and process for producing molded article excellent in abrasion resistance and chemical resistance.
JP3727126B2 (ja) * 1996-12-26 2005-12-14 日本写真印刷株式会社 金属薄膜インサートフィルム成形品の製造方法
FR2788714B1 (fr) * 1999-01-21 2001-03-16 Plastic Omnium Cie Procede pour fabriquer une piece moulee en matiere plastique partiellement peinte et pieces ainsi obtenues
FR2804364B1 (fr) * 2000-02-02 2002-09-13 Plastic Omnium Cie Procede de fabrication d'une piece en matiere plastique comportant un film decoratif, et piece ainsi obtenue
JP2002046207A (ja) * 2000-05-26 2002-02-12 Nakajima Kogyo Kk 低反射ハードコートフィルム、これを用いた成型品及びその製造方法
JP4857473B2 (ja) * 2001-02-20 2012-01-18 大日本印刷株式会社 射出成形同時加飾方法
KR20050020766A (ko) * 2002-03-25 2005-03-04 렉티셀 탄성표피제조용 몰드의 제조방법과 탄성표피의 제조방법
JP4268378B2 (ja) * 2002-06-18 2009-05-27 大日本印刷株式会社 射出成形同時加飾方法
JP4107917B2 (ja) * 2002-08-28 2008-06-25 日本写真印刷株式会社 インサート成形用シートおよびインサート絵付け品の製造方法
KR20040032016A (ko) * 2002-10-08 2004-04-14 (주)나크리 인서트 몰딩용 필름의 제조방법
DE10335620A1 (de) * 2003-08-04 2005-03-03 Basf Coatings Ag Verfahren zur Herstellung von Kunststoffformteilen mit funktionalen Oberflächen
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Patent Citations (2)

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Publication number Priority date Publication date Assignee Title
JPS62263013A (ja) 1986-05-09 1987-11-16 Dainippon Printing Co Ltd 絵柄付き射出成形体の製造方法
US20040229042A1 (en) 2001-04-06 2004-11-18 Hooker Michael A. Non-uniform, protective coating on a flexible substrate

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2281674A1 (fr) * 2009-07-31 2011-02-09 Hon Hai Precision Industry Co., Ltd. Article de matériau composé et son procédé de fabrication
WO2014044694A1 (fr) * 2012-09-19 2014-03-27 Bayer Materialscience Ag Procédé de fabrication d'une pièce moulée en plastique pourvue d'une peinture durcie par uv ainsi que pièce moulée
US10173355B2 (en) 2012-09-19 2019-01-08 Covestro Deutschland Ag Method for producing a molded part made of plastic and provided with a UV-cured paint, and said molded part
CN110435178A (zh) * 2019-09-05 2019-11-12 东莞广华汽车饰件科技有限公司 一种透光胶膜生产工艺

Also Published As

Publication number Publication date
EP2174765A3 (fr) 2010-06-09
JP2010089480A (ja) 2010-04-22
KR20100039189A (ko) 2010-04-15
JP3185929U (ja) 2013-09-12
TW201014659A (en) 2010-04-16
KR101103812B1 (ko) 2012-01-06
TWI348400B (en) 2011-09-11
EP2174765B1 (fr) 2014-12-10

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